YAMAHA MARINER 309S87301-1 Lower Unit 30HP 25HP

( Brand: Yamaha Mariner ), ( Manufacturer Part Number: 309S87301-1 ), ( Part Type: Unit ), ( Stroke: 2-stroke ), ( Warranty: 90 Day ), ( Donor Motor: 30hp Yamaha 30ae )

Review YAMAHA MARINER 30hp Inch Lower Unit 25hp fits 1977–2028

Yamaha Mariner 309S87301-1: A Legacy of Power and Reliability

The Yamaha Mariner 309S87301-1, a testament to Yamaha's unwavering commitment to quality and performance, is an outboard motor that has graced the waters from 1977 to the present day. This versatile powerhouse, available in 1992, 1993, and 30HP variants, is also compatible with the 25HP and 28HP upper units, offering a wide range of options to suit your boating needs.

Crafted with a meticulous attention to detail, the Mariner 309S87301-1 boasts a robust yet lightweight design. Its solid, die-cast aluminum alloy construction ensures durability and resistance to corrosion, while its compact size allows for easy handling and maneuverability.

Under the hood, this outboard motor packs a punch with its 30HP 2-stroke engine. The 20-inch lower unit, compatible with both 25HP and 28HP upper units, provides optimal propeller clearance and efficient water displacement for smooth, powerful acceleration.

Equipped with Yamaha's innovative Multi-Point Fuel Injection (MPFI) system, the Mariner 309S87301-1 ensures precise fuel delivery, resulting in improved combustion efficiency, reduced emissions, and increased fuel economy. Its adjustable trim and tilt features provide optimal control for handling various water conditions, ensuring a safe and enjoyable boating experience.

The Mariner 309S87301-1's ergonomic design includes a comfortable, rubber-grip handle and a control panel with easy-to-read gauges for RPM, fuel level, and oil pressure. Its reliable electric start system, coupled with a backup pull-start, ensures quick and hassle-free engine ignition.

In conclusion, the Yamaha Mariner 309S87301-1 is more than just an outboard motor; it's a symbol of power, reliability, and innovation. Whether you're a seasoned boater or a novice, this versatile powerhouse offers the perfect blend of performance, durability, and user-friendly design to elevate your boating adventures.

Yamaha Mariner 309S87301, a 30hp outboard motor produced between 1977 and 1993, has its unique set of advantages and drawbacks that should be considered before making a purchase.

1. Reliability: The Yamaha Mariner 309S87301 is known for its durability and robust construction, making it a reliable choice for boating enthusiasts.

2. Power: With a horsepower of 30, this motor provides ample power for pulling larger boats or handling rough waters.

3. Versatility: The 20, 25, and 28 inch lower unit options allow for compatibility with various boat models.

4. Parts Availability: As a long-produced model, many replacement parts are still available, ensuring easy maintenance and repair.

1. Age: Being produced over 30 years ago, the Mariner 309S87301 may have undergone wear and tear that affects its performance and efficiency.

2. Technology: Older models like this one lack the latest technological advancements found in more recent outboard motors, such as digital fuel injection systems and electronic controls.

3. Fuel Efficiency: Older engines, in general, are less fuel-efficient compared to modern outboard motors, which could lead to higher operating costs.

4. Compatibility: While the lower unit options are versatile, finding the correct fit for your specific boat model may be challenging due to the wide timeframe of production.

The Yamaha Mariner 309S87301 offers a reliable and powerful outboard motor option for those who prioritize durability and versatility. However, its age and lack of modern technology may lead to potential issues with performance and fuel efficiency.

If you are looking for a reliable and affordable used outboard motor for leisurely boating or as a backup, the Yamaha Mariner 309S87301 could be a suitable choice. However, if you require the latest technology, excellent fuel efficiency, or are looking for a primary motor for frequent use, it might be beneficial to consider a more recent model. In either case, it is essential to have the motor thoroughly inspected and serviced before making a purchase.

Details:

Clean gear oil with no water or metal present. Hi, Here is a nice lower unit removed from 30HP Yamaha 30AE / 30ELN. This should be fairly obvious using visual identification to match it up yours. Thanks, Andrew.

There is a photo of the ID tags. I do not know the year. 21 1/2 from case to end of shaft as shown. Turns and shifts smoothly.

part #: 309s873011 prices

• $530.05-$935.75

specifications ouboaen:

• for makes: Yamaha
• for years: 1977-2028
• brand: Yamaha Mariner
• mpn: 309s87301-1
• part type: Unit
• stroke: 2-stroke
• warranty: 90 Day
• donor motor: 30hp Yamaha 30ae

general ouboaen:

• condition: Used
• Boat Parts > Outboard Engines Components > Complete Outboard Lower Units

seller ouboaen:

• rating: 100.0%
• city: Port Townsend, Washington
• # reviews: 1810

offer ouboaen:

• quantity: 1
• options: Ship-to-home
• best offers: True
• started: December 5, 2025
• availability: In Stock
• sold: 0

returns ouboaen:

• time: 14 Days
• policy: Returns Accepted
• paid by: Buyer

shipping ouboaen:

• service: FedEx Ground Economy, USPS Ground Advantage, FedEx Ground / FedEx Home Delivery
• carrier: FedEx, USPS
• transit: 4-7 Days
• cost: $26.28
• type: Calculated
• class: Economy, Standard

payments ouboaen:

• wallet: Apple-pay
• other
• credit card: Mastercard

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